- 1628
Colour-Changing Star Sapphire and Diamond Ring
Estimate
160,000 - 200,000 HKD
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Description
- star sapphire, diamond, platinum
Centring on a colour-changing star sapphire weighing 25.50 carats, surrounded by brilliant-cut diamonds together weighing approximately 3.60 carats, mounted in platinum. Ring size: 5½
Condition
Colour and Clarity: According to GRS report, the cabochon colour-changing star sapphire is natural, of Ceylon origin, with no indication of thermal treatment. Please refer to the report for details. In our opinion, this colour-changing star sapphire displaying a noticeable colour-change effect from purple colour in incandescent lighting, to blue colour under daylight; also, it shows a fine six-ray asterism (star effect) under spot-lighting. Under 10x loupe, there are silk inclusions, very common in star sapphire and not noticeable to naked eyes. Diamonds in the surround are about F to G colours, VS clarity. Condition: Platinum ring mount, in very good condition.
In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective qualified opinion. Illustrations in the catalogue may not be actual size. Prospective purchasers are reminded that, unless the catalogue description specifically states that a stone is natural, we have assumed that some form of treatment may have been used and that such treatment may not be permanent. Our presale estimates reflect this assumption.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING CONDITION OF A LOT, ALL LOTS ARE OFFERED AND SOLD "AS IS" IN ACCORDANCE WITH THE CONDITIONS OF SALE PRINTED IN THE CATALOGUE.
In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective qualified opinion. Illustrations in the catalogue may not be actual size. Prospective purchasers are reminded that, unless the catalogue description specifically states that a stone is natural, we have assumed that some form of treatment may have been used and that such treatment may not be permanent. Our presale estimates reflect this assumption.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING CONDITION OF A LOT, ALL LOTS ARE OFFERED AND SOLD "AS IS" IN ACCORDANCE WITH THE CONDITIONS OF SALE PRINTED IN THE CATALOGUE.
Catalogue Note
Accompanied by GRS report numbered GRS2013-088502, dated 21 August 2013, stating that the 25.50 carat colour-changing star sapphire is natural, of Sri Lankan origin, colour changing from blue (daylight) to purple (incandescent light), with no indication of thermal treatment.